MOTU 828mkII User Manual page 10

20 inputs and 22 outputs
All 828mkII inputs and outputs can be used simul-
taneously, for a total of 20 inputs and 22 outputs:
Connection
Analog 24-bit 96kHz on +4/-10 bal/unbal TRS
Mic preamps 24-bit 96kHz on XLR/TRS combo
Main outputs 24-bit 96kHz on bal/unbal TRS
Headphone output
ADAT optical digital (at 44.1 or 48kHz)
SPDIF 24-bit 96kHz digital
Total
All inputs and outputs are discrete. In other words,
using a mic input does not "steal" an input from the
TRS analog I/O bank. The same is true for the
headphone outs and the main outs.
The ADAT optical ports provide 4 channels of I/O
at 88.2 or 96kHz. They can also be independently
configured as stereo TOSLink SPDIF at any
supported sample rate.
The headphone outputs can operate as an
independent output pair, or they can mirror any
other 828mkII output pair, such as the main outs.
Analog
All 10 analog inputs are equipped with 24-bit
96kHz, 64x oversampling A/D converters. All 10
analog outputs have 24-bit 128x oversampling D/A
converters. All audio is carried to the computer in a
24-bit data stream. All 10 analog outputs and the 8
rear-panel quarter-inch inputs are on balanced
TRS +4dB quarter-inch jacks. All of these jacks can
also accept unbalanced plugs.
All quarter-inch analog inputs can be individually
switched between a +4 and -10dB reference level.
An additional 6dB of software boost can be applied
via the CueMix Console software application or via
the front panel LCD display.
10
Mic sends
Before A/D conversion, the pre-amplified signal
from each front-panel mic/guitar input is routed to
one of the two rear-panel quarter-inch analog
Input Output
sends, so that you can insert a favorite outboard
8 8
EQ, compressor, amp or effects processor to the
mic/guitar input signal before it is converted to
2 -
digital form. The resulting output from the
- stereo
outboard gear can be fed back into the 828mkII via
- stereo
one of the eight TRS analog inputs on the rear
panel, for routing to the computer and/or inclusion
8 8
in the 828mkII's built-in monitor mixes.
stereo stereo
Main Outs
20 22
The main outs are equipped with 24-bit 128x
oversampling D/A converters and serve as
independent outputs for the computer or for the
828mkII's on-board CueMix DSP mixes.
Optical
The 828mkII optical jacks support two digital
audio formats: ADAT and S/PDIF. The ADAT
optical format provides eight channels of 24-bit
digital audio at either 44.1 or 48 kHz, and four
channels at 88.2 or 96kHz. The optical S/PDIF
format (often referred to as TOSLink), supplies
stereo S/PDIF input or output.
S/PDIF
The 828mkII rear panel provides S/PDIF input and
output in two different formats: RCA "coax" and
optical "TOSLink". The RCA jacks are dedicated to
the S/PDIF format. The TOSLink jacks can be used
either for either TOSLink or ADAT optical. The
optical input /output jacks can operate indepen-
dently. For example, the optical input can be set to
TOSLink while the optical output is set to ADAT.
MIDI I/O
The 828mkII's standard MIDI IN and MIDI OUT
jacks supply 16 channels of MIDI I/O to and from
the computer via the 828mkII's FireWire
connection. Timing accuracy can be sample-
accurate with host software that supports it.
A B O U T T H E 8 2 8 M K I I